Insulator for an open coil electric heating unit



FIG. 1 is a perspective view of an insulator for open coil electric heating unit, showing my new design;

FIG. 2 is a front elevational view of the insulator on an enlarged scale, the rear view being similar when the insulator is rotated 180 degrees about its longitudinal axis,

FIG. 3 is a side elevational view of the insulator on an enlarged scale, the opposite side being similar,

FIG. 4 is a sectional view, corresponding to the line 4--4 of FIG. 2,

FIG. 5 is an elevational view, looking from the bottom of FIG. 2, and

FIG. 6 is a sectional view corresponding to the line 6--6 of FIG. 2. 

The ornamental design for an insulator for an open coil electric heating unit, substantially as shown and described. 